Intro Strategy
Intro Strategy
Strategy
物件導向程式設計，並不是類別越多越好，類別的劃分是為了封裝，
但分類的基礎是抽象，具有相同屬性和功能之物件的抽象集合才是
類別。
策略模式(Strategy) 它定義了演算法家族，分別封裝起來，讓他們
之間可以互相替換，此模式讓演算法的變化，不會影響到使用演算法
的客戶。
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| abstract class Strategy
{
public abstract void AlgorithmInterface();
}
class ConcreteStrategyA : Strategy
{
public override void AlgorithmInterface()
{
Console.WriteLine("演算法A實現");
}
}
class ConcreteStrategyB : Strategy
{
public override void AlgorithmInterface()
{
Console.WriteLine("演算法B實現");
}
}
class ConcreteStrategyC : Strategy
{
public override void AlgorithmInterface()
{
Console.WriteLine("演算法C實現");
}
}
class Context
{
public Context(Strategy strategy)
{
this.strategy = strategy;
}
public void ContextInterface()
{
strategy.AlgorithmInterface();
}
}
static void Main(string[] args)
{
Context context;
context = new Context(new ConcreteStrategyA());
context.ContextInterface();
context = new Context(new ConcreteStrategyB());
context.ContextInterface();
context = new Context(new ConcreteStrategyC());
context.ContextInterface();
Console.read();
}
|